RealPlayer is a media player created by RealNetworks that plays a number of multimedia formats including MP3, MPEG-4, QuickTime, Windows Media formats and multiple versions of proprietary RealAudio and RealVideo codecs.

The first version of RealPlayer was introduced in April 1995 as RealAudio Player, one of the first media players capable of streaming media over the Internet. Version 6 of RealPlayer was called RealPlayer G2; version 9 was called RealOne Player. Free "Basic" versions have been provided as well as paid "Plus" versions with additional features. On Windows, version 9 subsumed the features of the separate program RealJukebox.